A bullying experiment on video... got to watch this

this was interesting and more than a little thought provoking. Tell me what you think

https://www.facebook.com/photo.php?v=396696013794251

I despise bullies, and thought that this was a very clever idea. However the clip should have concluded with some information and ideas of how people could help the victim whilst putting themselves in as little danger as possible.

Things such as calling campus security (if they do actually have them, and if they don't the bully may not be aware of that fact so a fake call may work).
Calling the Police.
Shouting for help.
Verbally speaking to the bully and dissuading him (as some did)
Filming him on you phone (again as some did.)
Then there is always the option of becoming involved physically (if necessary) this of course would be a personal decision.

99% of the witnesses / passersby in this video looked as though they would NOT become physical towards the bully, even if it was they who where being bullied. So alternatives to physical confrontation would best for themselves.